package Util;

public class test
{
    public static void main(String[] args)
    {
        long startTime = System.currentTimeMillis();
        int a = 3;
        int b = 4;
        System.out.println((int)Math.pow(a,b));
        System.out.println(Math.ceil(4.2222f));
        long endTime = System.currentTimeMillis();
        System.out.println("程序执行时间:");
        System.out.println(endTime - startTime + "ms");
    }
}
